Subjective questions for photoperiodism: What is photoperiodism? Give its historical background. Give classification of plants on the basis of photoperiodic responses. What is critical period? Explain. What are phytochromes? Give…
Multiple Choice Questions (MCQs) 1-The random abnormal number of chromosomes in the animals is called: • (a) Poh, ploidy (b) Euploid (c) aneuploid) (d) None A neuploith is mostly caused…
SUBJECTIVE QUESTIONS Describe different types of aberrations caused due to change in chromosome number. What is aneuploidy? Give its different types. What is polyploidy? Give its different forms. What is…
TERMS DEFINITIONS Chromosome aberration Any numerical or structural change in the usual chromosome complement of a cell or organism is called chromosome aberration. Aneuploidy The random abnormal number of chromosomes …
Sometimes, there can be breakage of a chromosome. It can produce variety of arrangements. These arrangements affect the genes of that chromosome. There are following types of chromosomal structural changes:…
TERMS DEFINITIONS Photoperiodism The response of plant tothe relative length of light and dark period is called photoperiodism. Short Day Plants (SDP) The plants that flower when day length…
Multiple Choice Questions MCQs Four options are given at the end of each statement. You should encircle one option from them. Franklin's X-ray data indicate that the helix makes one…
Differentiate between tap and adventitious roots. AnS: The root directly arise(' frOrn the seed is called tap iout. The roots arised from the stems or sometimes lea es arc called…
4. THE COCCIDEA Members of the phylum Apicomplexa are all parasites. There are following Characteristics of this phylum: 1. They have apical complex for penetrating host cells. 2. They have…
The phytochromes are present in the leaf. But the flowers are produced at the stein tip and its branches. The apical or lateral buds express the stimulus of flowering. It…
sana
rubab
abida
sidra
saadia